From: Charles Krug <charles AT pentek DOT com> Newsgroups: comp.os.msdos.djgpp Subject: Text mode windowing Date: Tue, 28 Oct 1997 13:48:59 -0500 Lines: 27 Message-ID: <3456339B.6FBE6F9B@pentek.com> NNTP-Posting-Host: mail.pentek.com Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit To: djgpp AT delorie DOT com DJ-Gateway: from newsgroup comp.os.msdos.djgpp Precedence: bulk I'm writing a text mode program that I'd like to "window" in text mode --create a text window that I can use to scroll through lengthy lists. The application is a database for my own purposes. I'm open to suggestions. Here are my thoughts: 1. Write the display routines using int21 and int10. This is very familiar territory for me, but I wonder if there isn't a better way that can be done from protected mode. 2. Display lengthy lists by spawning LESS. This is attractive, and is likely to be the first iteration. 3. I suppose I could roll one w/ Allegro. That may be the last iteration--for my own education. 4. Link using an existing library that provides some of the same functions. Unfortunatly, the only one's that I have access to are real mode--and frankly not much easier than writing my own int10 routines. Anyone with another idea? Thanx Charles Krug, Jr. 16 _GRFXBackgrBlit__FPUcPUci: ; prepare stack frame push ebp mov ebp, esp cld mov edi, [ebp + GRFXBackgrBlit_screenbuffer] mov esi, [ebp + GRFXBackgrBlit_image] mov ecx, [ebp + GRFXBackgrBlit_size] rep movsb ; restore stack frame mov esp, ebp pop ebp ret I also have a grfx.cc file with the function declared as: #include <grfx.h> ..other functions.. // copies a background to the screen buffer extern void GRFXBackgrBlit(byte screenbuffer[], // screen buffer to copy background to byte image[], // background image bitmap to copy int size); // size of bitmap And a grfx.h header file with the function declared as: // copies a background to the screen buffer void GRFXBackgrBlit(byte screenbuffer[], // screen buffer to copy background to byte image[], // background image bitmap to copy int size); // size of bitmap The object file is created with: nasm -f coff grfx_a.asm Now, when I try to link the external routine into my DJGPP C++ program, the linker responds with: "undefined reference: void GRFXBackgrBlit(unsigned char *, unsigned char *, int)" All the other assembler functions (GRFXClearBuffer etc.) link orrectly with the same type of header file. So the problem doesn't seem to be with the C++ portions of the program. I discovered that removing one of the pointers from the GRFXBackgrBlit parameter list in both the C++ and assembler source files causes the function to be recognised by the DJGPP linker. It seems that one is unable to use two pointers as parameters in an external function. But this surely can't be. I would appreciate it if someone could explain to me what I'm doing wrong. Please mail me at: 9618872 AT pukrs3 DOT puk DOT ac DOT za I will send a summary to the newsgroup at a later stage. Rudolf Visagie